Completing the β,γ-CXY-dNTP Stereochemical Probe Toolkit: Synthetic Access to the dCTP Diastereomers and <sup>31</sup>P and <sup>19</sup>F NMR Correlations with Absolute Configurations
作者:Pouya Haratipour、Corinne Minard、Maryam Nakhjiri、Amirsoheil Negahbani、Brian T. Chamberlain、Jorge Osuna、Thomas G. Upton、Michelle Zhao、Boris A. Kashemirov、Charles E. McKenna
DOI:10.1021/acs.joc.0c01204
日期:2020.11.20
documented here, but the reductive deprotection step is not compatible with dCTP or the bromo substituent in β,γ-CHBr-dNTP analogues. To complete assembly of the toolkit, we describe an alternative synthetic strategy featuring ethylbenzylamine or phenylglycine-derived chiral BP synthons incorporating a photolabile protecting group. After acid-catalyzed removal of the (R)-(+)-α-ethylbenzylamine auxiliary
β,γ-氧被一个CXY基团模拟的核苷5'-三磷酸(dNTP)类似物(β,γ-CXY-dNTPs)提供了有关DNA聚合酶催化和保真度的信息。CXY立体化学的定义对于阐明精确的结合模式非常重要。我们之前曾报道过通过P,C-二吗啉酰胺CHCl(6a,6b)和CHF(7a,7b)双膦酸酯制备的(R)-和(S)-β,γ-CHX-dGTP非对映异构体(X = F,Cl)(BPs)配备(R)-扁桃酸作为手性助剂,并使用H 2 / Pd进行最终脱保护。该方法还提供了β,γ-CHCl-dTTP(11a,11b),β,γ-CHF(12a,12b)和β,γ-CHCl(13a,13b)dATP非对映异构体,但还原脱保护步骤与dCTP或β,γ-CHBr中的溴取代基不相容-dNTP类似物。为了完成该工具包的组装,我们描述了一种替代合成策略,其特征在于乙基苄胺或苯基甘氨酸衍生的手性BP合成子并入了对光不稳定的保护基团。